If I'm not mistaken, '88 to '89 Civic headlight assemblies are interchangeable. I'm not sure about the '90 to '91 because the corner lights attach to the headlight assembly. That's why you don't see the attachment screws on the outside for those years. The CRX has different corner lights than the hatch or sedan. So maybe '90-'91 headlight assemblies are interchangeable...it's just a matter of attaching the correct corner lights. Hope that helps.